{"instruction": "You are an expert in event extraction. Please extract events from the input that conform to the schema definition. Return an empty list for events that do not exist, and return NAN for arguments that do not exist. If an argument has multiple values, please return a list. Respond in the format of a JSON string.", "schema": [{"event_type": "potential therapeutic event", "trigger": true, "arguments": ["Treatment.Freq", "Treatment.Route", "Treatment.Disorder", "Subject.Population", "Subject.Disorder", "Treatment.Duration", "Treatment.Time_elapsed", "Subject.Race"]}, {"event_type": "adverse event", "trigger": true, "arguments": ["Subject.Race", "Subject", "Treatment.Drug", "Treatment.Route", "Treatment.Duration", "Treatment.Dosage", "Treatment.Freq", "Treatment.Time_elapsed", "Treatment.Disorder", "Subject.Disorder", "Combination.Drug", "Subject.Population", "Subject.Age", "Effect", "Subject.Gender", "Treatment"]}], "input": "The pro-arrhythmic effects of procainamide may be explained on the basis of both its vagolytic action on the atrioventricular node as well as by prolongation of refractoriness in the accessory pathway."}
{"potential therapeutic event": [], "adverse event": [{"trigger": "of ", "arguments": {"Subject.Race": "NAN", "Subject": "NAN", "Treatment.Drug": "procainamide", "Treatment.Route": "NAN", "Treatment.Duration": "NAN", "Treatment.Dosage": "NAN", "Treatment.Freq": "NAN", "Treatment.Time_elapsed": "NAN", "Treatment.Disorder": "NAN", "Subject.Disorder": "NAN", "Combination.Drug": "NAN", "Subject.Population": "NAN", "Subject.Age": "NAN", "Effect": "pro-arrhythmic effects", "Subject.Gender": "NAN", "Treatment": "procainamide"}}]}